mersenneforum.org - View Single Post - 2^1571237 · (1153# - 1) + 1

bur · 2021-01-20, 09:43

2^1571237 * (1153# - 1) + 1 is a new prime submitted to PrimePages.

It is almost a PrimoProth, which are interesting in that they have a low weight, but why the -1? It decreases the number of small factors of N-1, but if you're after that, you might just use a prime for k.

2021-01-20, 09:43	#1
bur Aug 2020 796581e-4;32539e-3 503 Posts	2^1571237 · (1153# - 1) + 1 - why was it constructed like that? 2^1571237 * (1153# - 1) + 1 is a new prime submitted to PrimePages. It is almost a PrimoProth, which are interesting in that they have a low weight, but why the -1? It decreases the number of small factors of N-1, but if you're after that, you might just use a prime for k.